Add auth support (#21)

* Updates

* Update

* Update

* Update

* Update

* Yarn sometimes prefers npmrc, so use same token

* Description

* Update readme

* Feedback

* Add type

* new toolkit and scoped registries

* npmrc in RUNNER_TEMP

* Dont always auth

* Try exporting blank token

* Get auth working for now pending runner changes

* Fix string interpolation for auth token.

* Don't export both userconfigs

* Update authutil.js

* Add single quotes for authString

* Fix the registry string.

* Use userconfig and append trailing slash

* Keep in root of repo

* Try just adding auth token

* Remove auth token

* Try changes again

* Add tests

* Npm and GPR samples

* Add types

node_modules/is-stream/readme.md

@@ -0,0 +1,42 @@
+# is-stream [![Build Status](https://travis-ci.org/sindresorhus/is-stream.svg?branch=master)](https://travis-ci.org/sindresorhus/is-stream)
+
+> Check if something is a [Node.js stream](https://nodejs.org/api/stream.html)
+
+
+## Install
+
+```
+$ npm install --save is-stream
+```
+
+
+## Usage
+
+```js
+const fs = require('fs');
+const isStream = require('is-stream');
+
+isStream(fs.createReadStream('unicorn.png'));
+//=> true
+
+isStream({});
+//=> false
+```
+
+
+## API
+
+### isStream(stream)
+
+#### isStream.writable(stream)
+
+#### isStream.readable(stream)
+
+#### isStream.duplex(stream)
+
+#### isStream.transform(stream)
+
+
+## License
+
+MIT © [Sindre Sorhus](https://sindresorhus.com)